Salut,
J'ai testé le scan online de bitdefender.
Ca donne ça:

[Scan Statistics]
Folders = 4194
Files = 482480
Archives = 19023
Packed files = 15806
Identified viruses = 2
Infected files = 3
Warnings = 0
Suspect files = 0
Disinfected files = 0
Deleted files = 3
Copied files = 0
Moved files = 0
Renamed files = 0
I/O Errors = 22

[Scan Settings]
SecondAction = Delete
FirstAction = Disinfect
Heuristics = 1
Enable Warnings = 1
Exclude Ext =
Extensions = exe;com;dll;ocx;scr;bin;dat;386;vxd;sys;wdm;cla;class;ovl;ole;hlp;doc;dot;xls;ppt;wbk;wiz;pot;ppa;xla;xlt;vbs;vbe;mdb;rtf;htm;hta;html;xml;xtp;php;asp;js;shs;chm;lnk;pif;prc;url;smm;pfd;msi;ini;csc;cmd;bas;
Scan Emails = 1
Scan Archives = 1
Scan Packed = 1
Scan Files = 1
Scan Boot = 1
Verify Memory = 0

[Scan Results]
Line00000008 = "C:\WINDOWS\system32\fsqrbtnj.exe Infected with: Backdoor.Poebot.C"
Line00000007 = "C:\WINDOWS\system32\fsqrbtnj.exe Disinfection failed"
Line00000006 = "C:\WINDOWS\system32\fsqrbtnj.exe Deleted"
Line00000005 = "C:\WINDOWS\system32\ktmotf.exe Infected with: Backdoor.PoeBot.C"
Line00000004 = "C:\WINDOWS\system32\ktmotf.exe Disinfection failed"
Line00000003 = "C:\WINDOWS\system32\ktmotf.exe Deleted"
Line00000002 = "C:\WINDOWS\system32\zihtqsf.exe Infected with: Backdoor.PoeBot.C"
Line00000001 = "C:\WINDOWS\system32\zihtqsf.exe Disinfection failed"
Line00000000 = "C:\WINDOWS\system32\zihtqsf.exe Deleted"

C cool qu'il m'est viré ces merdes mais avast me les detecte et les extermine plusieurs */j aussi...le pb c qu'elles "reviennent", à moins que avast ne les supprime pas réellement (ce qui est + probable).
Je vais voir si bitdefender m'en a débarassé définitivement...

merci a+